I have a jail-Configuration in /etc/jail.conf: testjail { exec.start = "/bin/sh /etc/rc"; exec.stop = "/bin/sh /etc/rc.shutdown"; exec.clean; host.hostname = "testjail"; path = "/VMs/jails/$name"; interface = "msk0"; ip6.addr = "fd9e:21a7:a92c:2323::1/40"; mount = "/tmp $path/tmp nullfs rw 0 0"; } If I start the jail with jail -c testjail -> No problem If I stop the jail with jail -r testjail -> No problem If I restart a running jail with jail -cr testjail -> I get following error: testjail: run command: /sbin/ifconfig msk0 inet6 fd9e:21a7:a92c:2323::1/40 > alias ifconfig: >: bad value jail: testjail: /sbin/ifconfig msk0 inet6 fd9e:21a7:a92c:2323::1/40 > alias: failed There's a invalid character ('>') in the ifconfig line. Where it come from? I don't know. The failure will not occur if I delete the "mount"-Line from the Configuration (It doesn't matter have a 'mount'-Line or 'mount.fstab'). The failure will also not occur if I append the ifconfig-Parameter 'description' at the end of 'ip6-addr' like: ip6.addr = "fd9e:21a7:a92c:2323::1/40 description a"; And the failure will only happen with ip6.addr The same with ip4.addr is not a problem. It seems to me there is a problem with string handling in the jail command.
There's a null pointer dereference in there. It has actually been fixed for IP4 but missed IP6.
A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=e8d7ae918a105f252cf06249787d82f43e023ba8 commit e8d7ae918a105f252cf06249787d82f43e023ba8 Author: Jamie Gritton <jamie@FreeBSD.org> AuthorDate: 2022-12-15 00:47:55 +0000 Commit: Jamie Gritton <jamie@FreeBSD.org> CommitDate: 2022-12-15 00:47:55 +0000 jail: fix a NULL pointer derefence in parsing ip6.addr settings. This is the counterpart to bd24e861b4ef, which did the same for ip4. PR: 268377 Reported by: ahkithaama at proton.me usr.sbin/jail/command.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
A commit in branch stable/13 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=47f21d91808c687e88f7f63930b73a893ce6d2a1 commit 47f21d91808c687e88f7f63930b73a893ce6d2a1 Author: Jamie Gritton <jamie@FreeBSD.org> AuthorDate: 2022-12-15 00:47:55 +0000 Commit: Jamie Gritton <jamie@FreeBSD.org> CommitDate: 2022-12-18 00:31:31 +0000 jail: fix a NULL pointer derefence in parsing ip6.addr settings. This is the counterpart to bd24e861b4ef, which did the same for ip4. PR: 268377 Reported by: ahkithaama at proton.me (cherry picked from commit e8d7ae918a105f252cf06249787d82f43e023ba8) usr.sbin/jail/command.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
A commit in branch stable/12 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=561dcc7f3722315c55176be5611a010155724a89 commit 561dcc7f3722315c55176be5611a010155724a89 Author: Jamie Gritton <jamie@FreeBSD.org> AuthorDate: 2022-12-15 00:47:55 +0000 Commit: Jamie Gritton <jamie@FreeBSD.org> CommitDate: 2022-12-18 00:33:04 +0000 jail: fix a NULL pointer derefence in parsing ip6.addr settings. This is the counterpart to bd24e861b4ef, which did the same for ip4. PR: 268377 Reported by: ahkithaama at proton.me (cherry picked from commit e8d7ae918a105f252cf06249787d82f43e023ba8) usr.sbin/jail/command.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)